Reaches a maximum length of 12 in (30 cm) and a maximum weight of 12.3 oz (350 g). It is thick-bodied (length/depth ratio, about 3:9) and light brown to pinkish brown on the sides, with irregular darker blotches; the belly is silvery gray. It is covered with ctenoid scales, except for a patch between the eyes, where there may be a single row of scales. Three distinct color varieties are known:
• continuous white band across the nape and opercula
• an interrupted band, consisting of a narrow medial stripe on the nape and on each operculum
• no white marking DISTRIBUTION
Coastal waters of Antarctica, including the Antarctic Peninsula and South Shetland and South Orkney Islands.
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